/*
 * GJexer - GPL Java Text User Interface
 *
 * The GNU General Public License Version 3
 *
 * Copyright (C) 2021 Autumn Lamonte
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @author Autumn Lamonte [AutumnWalksTheLake@gmail.com] ⚧ Trans Liberation Now
 * @version 1
 */
package gjexer.tterminal;

/**
 * DisplayListener is used to callback into external UI when data has come in
 * from the remote side.
 */
public interface DisplayListener {

    /**
     * Function to call when the display needs to be updated.
     */
    public void displayChanged();

    /**
     * Function to call to obtain the display width.
     *
     * @return the number of columns in the display
     */
    public int getDisplayWidth();

    /**
     * Function to call to obtain the display height.
     *
     * @return the number of rows in the display
     */
    public int getDisplayHeight();

}
